The S63B44B (also written as S63B44B or S63TU and related variants) is a high-performance 4.4L twin-turbocharged V8 gasoline engine developed by BMW’s M Division based on the N63. It is a high-output version of the N63, built specifically for M models, featuring a hot-V twin-turbo design, reinforced internal components, and higher power output. The S63B44B belongs to the newer S63TU variant, which adds Valvetronic, a higher compression ratio, and an improved turbocharger and cooling system compared to the earlier S63B44O0.
Our products are exported to various parts of the country, and the customers we have worked with have received unanimous praise. The company has invested over 20 million yuan in high-end remanufacturing equipment imported from abroad and a first-class production team in the country. Our warehouse has a total area of over 8000 square meters, with scientific management and sufficient supply of goods.
Specifications
Engine Code: S63B44B (Related variants include S63B44T0, S63B44T2, S63B44T4, etc.)
Displacement: 4,395 cm³ (4.4 L)
Bore × Stroke: 89.0 mm × 88.3 mm
Compression Ratio: Approx. 10.0:1 (higher in later models)
Cylinder Configuration: 90° V8, aluminum alloy cylinder block
Valve Train: DOHC 32-valve + Double-VANOS + Valvetronic
Fuel System: Direct injection
Turbocharging: Twin-Scroll turbochargers (center-mounted on the hot end)
Power Range: Approx. 560–635 PS (depending on specific calibration; higher for Competition / CS models)
Torque range: approx. 680–750 Nm
Timing drive: timing chain
Engine oil capacity: approx. 8.5–10 L (BMW Longlife-spec high-performance engine oil recommended)
Production years: approx. 2011 onward (S63TU series continues through newer models)
A long block typically includes core components such as the cylinder block, crankshaft, pistons, connecting rods, cylinder head, and timing system. The S63 series uses reinforced forged or high-spec internal components, making it better suited for high-load applications and track use than the standard N63. When replacing it, you must verify the exact part number and the vehicle’s VIN.
| Model Number | S63B44B |
Primary Compatible Models
The S63B44B is primarily used in BMW M high-performance models:
BMW M5 (F10 / F90)
BMW M6 (F06 / F12 / F13)
BMW M8 (F91 / F92 / F93)
BMW X5 M (E70 / F85 / F95)
BMW X6 M (E71 / F86 / F96)
Some Competition and CS versions have higher power output
The early S63 was used in the X6 M and the first-generation M5, while the S63B44B (TU update) has been widely used starting with the F10 M5.
| Place of Origin | Guangdong, China |
| Condition | New |
| Purpose | for replace/repair |
| Type | Gas / Petrol Engine |
| Power | OEM Standards |
| Quantity (pieces) | 1 - 10 | 11 - 50 | > 50 |
| Lead time (days) | 7 | 15 | To be negotiated |
1. Our remanufactured products use accessories provided by well-known brand suppliers such as VICTORREINZ, SCHAEFFLER, KS KOLBENSCHMIDT GmbH, etc.
2. Our product quality is close to the original factory quality, but the price is only 50-60% of the original engine. We can also provide you with a one-year or 100000 kilometer warranty service for the entire machine, and professional after-sales personnel will follow up with you.
3. We have over 15 years of experience in the production and research of automotive engines, and our technical level and personnel training are very scientific and mature. Customers who have worked with us have expressed their agreement with our products and after-sales service.
4. 2018 It has achieved an annual production capacity of 2200 units and has become a major supplier of high-end engine remanufacturing and parts in China's automotive aftermarket.
5. In April 2021, T/CAAMTB passed the certification company of China Automobile Research and Huacheng. 19-2019 Certification of the management system requirements of gas vehicle parts remanufacturing enterprisesIn October 2021, he became a member of the National Green Manufacturing Technology Standardization Committee and participated in the drafting of the Technical Specification for Assembly of Remanufacturing Mechanical and Electrical Products.
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